Columbia Basin Performance Measures

Adult Passage Exposure Results

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Adult Steelhead Query Parameters
Year2024
ProjectLower Monumental
River ParameterTailrace TDG Percent
Critical Tailrace TDG Percent Value120 %
Calculate ExposureAbove Critical Value
River Parameter Data FillNo
Query Dates1/1 - 12/31
Total Run Period (Apr 1 - Oct 31)
Total Number of Fish Observed96807
Percent of Total Run Analyzed [Number Observed]100 % [96807]
Tailrace TDG Percent Exposure Index105.82 %
Percent of Fish Exposed [Number Exposed]3 % [2936]
Number of Days Fish Exposed18
Middle 80% of Run Period (Sep 1 - Oct 14)
Number of Fish Observed77851
Percent of Middle 80% of Run Analyzed [Number Observed]100 % [77851]
Tailrace TDG Percent Exposure Index105.4 %
Percent of Fish Exposed [Number Exposed]3.5 % [2790]
Number of Days Fish Exposed1
Middle 50% of Run Period (Sep 12 - Oct 3)
Number of Fish Observed50736
Percent of Middle 50% of Run Analyzed [Number Observed]100 % [50736]
Tailrace TDG Percent Exposure Index105.82 %
Percent of Fish Exposed [Number Exposed]5.4 % [2790]
Number of Days Fish Exposed1
Run Dates
First Day of RunApr 1
5% of Run passedAug 4
10% of Run passedSep 1
50% of Run passedSep 24
90% of Run passedOct 14
95% of Run passedOct 21
Last Day of RunOct 31
Date(s) When Tailrace TDG Percent Crosses 120 %
Apr 16, Apr 18, Apr 27, May 1, May 13, May 21, May 30, Jun 1, Jun 4, Jun 6, Jun 9, Jun 12, Jun 13, Jun 14, Jul 3, Jul 4, Sep 30, Oct 1